/* Copyright 2009
 *
 * This program and the accompanying materials
 * are made available under the terms of the
 * Eclipse Public License v1.0 which accompanies
 * this distribution, and is available at
 *
 * 		http://www.eclipse.org/legal/epl-v10.html
 *
 * Unless required by applicable law or agreed to in
 * writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES
 * OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * Contributors:
 * 	   IBM Corporation - initial API and implementation for JDT/DLTK
 *     Sean W. Quinn - initial adoption for use with PHP from various sources.
 */
package org.eclipse.php.internal.core.util;

import org.eclipse.php.core.util.IConstantPool;
import org.eclipse.php.core.util.IConstantPoolConstant;
import org.eclipse.php.core.util.IConstantPoolEntry;
import org.eclipse.php.core.util.ISourceAttribute;
import org.eclipse.php.core.util.ScriptFormatException;

/**
 * Default implementation of ISourceAttribute
 */
public class SourceFileAttribute extends ScriptFileAttribute implements ISourceAttribute {

	private int sourceFileIndex;
	private char[] sourceFileName;

	/**
	 * Constructor for SourceFileAttribute.
	 *
	 * @param classFileBytes
	 * @param constantPool
	 * @param offset
	 * @throws ScriptFormatException
	 */
	public SourceFileAttribute(byte[] classFileBytes, IConstantPool constantPool, int offset)
			throws ScriptFormatException {
		super(classFileBytes, constantPool, offset);
		this.sourceFileIndex = u2At(classFileBytes, 6, offset);
		IConstantPoolEntry constantPoolEntry = constantPool.decodeEntry(this.sourceFileIndex);
		if (constantPoolEntry.getKind() != IConstantPoolConstant.CONSTANT_Utf8) {
			throw new ScriptFormatException(ScriptFormatException.INVALID_CONSTANT_POOL_ENTRY);
		}
		this.sourceFileName = constantPoolEntry.getUtf8Value();
	}

	/**
	 * @see ISourceAttribute#getSourceFileIndex()
	 */
	public int getSourceFileIndex() {
		return this.sourceFileIndex;
	}

	/**
	 * @see ISourceAttribute#getSourceFileName()
	 */
	public char[] getSourceFileName() {
		return this.sourceFileName;
	}

}
